2026 data ClinicalTrials.gov official source

Conditions: R

Compiled by PlainTrial Editorial, Clinical Trial Intelligence Editorial Team · January 1, 2026

Every condition beginning with R that has a registered US clinical trial, with how many studies cover each.

1,694 conditions starting with "R"

Showing 1,501–1,550 of 1,694

Condition	Trials	Recruiting
Revision Hip Arthroplasty	1	1
Revision of Other Devices if Sufficient Bone Stock Remains	1	-
Revision of the Hip Joint	1	-
Revision Total Knee Arthroplasty	1	-
Revision Total Shoulder Arthroplasty	1	-
Reward Value Level	1	1
Rewarding Mediating System	1	-
Rhabdoid Tumor	7	3
Rhabdoid Tumor of Liver	1	1
Rhabdoid Tumor of the Kidney	4	-
Rhabdoid Tumor of the Kidney (RTK)	1	1
Rhabdoid Tumors	1	-
Rhabdomyolysis	2	1
Rhabdomyosarcoma	36	17
Rhegmatogenous Retinal Detachment	4	3
Rheologic Disease	1	-
Rhesus D Genotype	1	1
Rheumatic Arthritis	1	1
Rheumatic Disease	3	2
Rheumatic Diseases	12	4
Rheumatic Joint Disease	2	2
Rheumatoid and Osteoarthritis	1	-
Rheumatoid Arthritis	199	37
Rheumatoid Arthritis (RA)	18	12
Rheumatoid Arthritis Interstitial Lung Disease	1	-
Rheumatoid Arthritis of Hip	1	1
Rheumatoid Arthritis of Knee	2	-
Rheumatoid Arthritis Shoulder	2	1
Rheumatoid Arthritis Without Humeral Metaphyseal Defects	1	-
Rheumatoid Arthritis-Associated Interstitial Lung Disease	1	1
Rheumatoid Vasculitis With Rheumatoid Arthritis of Knee	1	-
Rheumatologic Disease	4	4
Rhinitis	4	-
Rhinitis Allergic, Persistent	1	-
Rhinitis, Allergic, Perennial	3	-
Rhinitis, Allergic, Perennial and/or Seasonal	1	-
Rhinitis, Allergic, Seasonal	4	-
Rhinitis, Vasomotor	2	1
Rhinoplasty	2	-
Rhinosinusitis	2	1
Rhinosinusitis Acute	1	-
Rhinovirus	1	-
Rhizotomy	1	1
Rhythm; Sleep	1	-
Rhythmic Transcranial Magnetic Stimulation (rTMS) Effect on Hierarchical Cognitive Control	1	-
Rhytides	6	-
Rhytids	2	1
Rib Fracture	1	1
Rib Fracture Multiple	5	4
Rib Fractures	10	4

Data sourced from official public datasets. See our methodology for details.